To be angry with Greggs girl?

Went i to my local Greggs and ordered two pepperoni pizzas and a star cookie for dd. Guy at checkout tells me that i can have a drink for only 50p. I picked a coke and put it on the counter. Girl behind me pipes up "you really should have a ribena with two pizzas and a cookie,not coke". I replied with " I'm a grownup and i'll pick my own bloody drink,thank you!". As to not drip feed,yes i am fat(in case that was her issue) ,no i don't like ribena.

I say girl as she was/looked really young. Could be she's older than me,didn't ask for id. Yes it really did happen.I didn't like being challenged on something i picked and paying for.I am a grownup and i'm perfectly capable of picking something regardless if they "go together" or not.This is the bit that actually annoyed me.

YNBU. Too many people have too much to say. People want to start worrying about themselves. I'm not surprised you snapped. Hopefully that'll be a lesson to her, that. You can't just say what you like. The fact that. "You're fat". Your words not mine, doesn't even come into play, here.Your money. Your body. Your business.

She works in Greggs, she probably sees all sorts, it's hardly a place you go to make healthy informed choices, I really doubt she was judging you.

Maybe she was trying to make a joke. I'm not fat but when I raised McDonald's the other day for hangover food I ordered a Diet Coke with my Big Mac meal, not because I suddenly had calorie anxiety but because I prefer the taste, but the bloke asked me if I was trying to do wine 'damage control'.